Project Overview

This project was carried out under the North and Mid Wales Trunk Road Agency (NMWTRA) Framework and involved improvements to this busy interchange on the A494 Trunk road, to make it a signalised gyratory and to increase traffic capacity. 

The scheme involved widening of both off slip roads from two lanes to three, and the widening of the circulating carriageway of the roundabout to accommodate three running lanes. Traffic signals were installed on the roundabout and we also carried out resurfacing works on both the off slips all the way to the join with the main A494 dual carriageway. This was carried out at night and required full slip road closures and traffic management on the A494 Trunk road. 

In addition, the B5129 leading to Queensferry was also widened from two to three lanes, and modifications were carried out to the Asda superstore junction, including new traffic signals, traffic islands, street lighting and drainage. 

The works were phased to keep disruption to a minimum with some elements of work located away from residential areas being carried out at night. There were a number of neighbouring residential properties and businesses, and access had to be maintained throughout. 

A full weekend closure of the interchange was required to carry out resurfacing works to the interchange and slip roads in a safe and efficient manner. During the closure the site team worked 24 hours each day from Friday night to Monday morning. This was the largest closure ever carried out in Flintshire and required weeks of advance planning and consultations with local councillors, affected businesses, emergency services, local schools, bus companies and the A55/A494 Route Manager. 

The main contract works were completed on time and within budget. Nearing completion of the project additional works were awarded, which included construction of 300m of cycle path, the demolition of existing public toilets, extension works to a car park and associated drainage, kerbing and surfacing works.

Project Gallery


Flintshire County Council/NMWTRA



Project Value


Contract Period

22 weeks